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简要介绍新近完成的 7个国家一级标准物质的研制成果 ,其在品种上和元素的含量与组合特征上是对已有GSR和GSD系列地球化学标准物质的重要补充。
A brief introduction to the newly completed research results of seven national standard substances has been made, which is an important complement to the existing GSR and GSD series of geochemical reference materials in terms of variety, elemental content and combination characteristics.